US3709068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission
Assignee: Individual
•
Filing: 1970-12-28
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Granted: 1973-01-09
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Expires: 1990-12-28
Abstract
Abstract A multiple speed power transmission for a motor vehicle in which a free wheeling device is provided for effecting a shift from low to high speed drive ratio without disconnecting clutch means from a lower speed The the power transmission includes control means which comprises a manually operated shifting device and a fluid pressure operated servo motor. The fluid pressure operated servo motor is associated with the manually operated shifting device thereby to effect the shift between a plurality of gear ratios either automatically or manually.
Inventors
- 👤 Y Mohri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:47
CPC Classifications
F; F16; F16H; F16H63/00; F16H63/02; F16H63/30; F16H63/3023; F16H3/00; F16H3/02; F16H3/08; F16H3/10; F16H61/00; F16H61/02; F16H61/0202; F16H61/0248; F16H61/0293; F16H59/00; F16H2059/006; F16H61/0251; F16H2061/026; F16H2708/00; F16H2708/10; F16H2708/12; F16H59/14; F16H59/24; F16H59/36; F16H59/44; F16H59/60; F16H59/66; F16H59/68; F16H59/70; F16H59/72; F16H61/0204; F16H61/0213; F16H61/68; F16H61/682; Y; Y10; Y10S; Y10S477/00; Y10S477/901; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19284
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
164 words
In a multiple speed power transmission for a motor vehicle driven by an engine and having a torque converter including a driving element and a driven element, the combination comprising, a drive shaft, a driven shaft, an intermediate shaft, a countershaft, main drive gear means connecting said intermediate shaft to said countershaft, a plurality of gear means provided on said countershaft and said driven shaft and meshing with each other, a plurality of clutch means engaged with said gear means for selectively providing a drive connection between said countershaft and said driven shaft thereby to provide a plurality of gear ratios, and a free wheeling means provided between one of said gear means and the clutch means engaged therewith, said free wheeling means permitting said driven shaft to rotate at a speed higher than the speed of rotation of said one of said gear means, whereby upshifting is effected without disconnecting said one of said clutch means from one of gear means engaging therewith.
Claim 2
Dependent Claim
164 words
In a multiple speed power transmission for a motor vehicle driven by an engine and having a torque converter including a driving element and a driven element, the combination comprising, a drive shaft, a driven shaft, an intermediate shaft, a countershaft, main drive gear means connecting said intermediate shaft to said countershaft, a plurality of gear means provided on said countershaft and said driven shaft and meshing with each other, a plurality of clutch means engaged with said gear means for selectively providing a drive connection between said countershaft and said driven shaft thereby to provide a plurality of gear ratios, and a free wheeling means provided between one of said gear means and the clutch means engaged therewith, said free wheeling means permitting said driven shaft to rotate at a speed higher than the speed of rotation of said one of said gear means, whereby upshifting is effected without disconnecting said one of said clutch means from one of gear means engaging therewith.
Claim 3
Dependent Claim
75 words
The combination according to claim 1, further comprising a manually operated shifting device to shift one of said clutch means and having a plurality of shifting positions each corresponding to said plurality of gear ratios, a fluid pressure operated servo motor to select three different positions, and a control system for controlling said fluid pressure operated servo motor to thereby shift another one of said clutch means for selectively providing said plurality of gear ratios.
Claim 4
Dependent Claim
132 words
The combination according to claim 2, wherein said manually operated shifting device comprises a manually operated shift lever, a control arm rotatable about a first pivot and having a pin describing a circular path about said first pivot, and a cam plate rotatable about a second pivot and having a slot receiving said pin of said control arm, said slot including first, second and third portions, said first and third portions being formed with the same radii of curvature to cause said cam plate to remain fixed relative to said second pivot when said pin moves along said first and third portions, said second portion causing said cam plate to rotate around said second pivot when said pin moves along said second portion, whereby said plurality of gear ratios is selectively expected.
Claim 5
Dependent Claim
90 words
The combination according to claim 2, wherein said control system comprises a source of fluid pressure, first and second shift valve means operatively communicating with said source of fluid pressure for actuating said fluid pressure operated servo valve means, and first and second solenoid valve means associated with said first and second shift valve means, said first and second solenoid valve means being responsive to movement of said manually operated shifting device to control said first and second shift valve means for thereby selectively providing said plurality of gear ratios.
Claim 6
Dependent Claim
92 words
The combination according to claim 4, wherein said control system further comprises a selector switch engaged with said manually operated shifting device to generate a first signal, sensing means to sense varying driving conditions of said motor vehicle for generating a second signal corresponding to said varying driving conditions, and a shift pattern generating means electrically connected to said selector switch and said sensing means and responsive to said first and second signals for generating a third signal to control said solenoId valve means for thereby establishing said plurality of gear ratios.
References Cited (Backward Citations)
US3440904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |